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Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/1737

Title: Enhancement of micro-drilling performance by cryogenic treatment of drill bit
Authors: Maity, K P
Chaini, S
Singh, K
Keywords: Micro-drilling
Cryo-treatment
circularity
Grey-Taguchi Method
Issue Date: Jun-2012
Citation: 26th International Conference on surface modification technologies, june 20th -22nd 2012, Ecole Centrale de Lyon Ecully France
Abstract: Cryogenic treatment is one time permanent treatment that affects the entire section or bulk of the component unlike coatings. The cryogenic treatment is an add on process over conventional heat treatment in which the samples are cooled down to prescribed cryogenic temperature for a long time and then heated back to room temperature. The process is not a substitute for heat treatment but rather an extension of the heating/quenching/tempering cycle. In most instances the cryogenic cycle is followed by a heat tempering procedure[1]. Two major changes in micro-structure of steel occur as a result of cryogenic treatment[2,3], which play the principal role for dramatic improvement in wear resistance. The retained austenite are transformed to wear resistant martensite to achieve more uniform hardness. Fine carbide precipitates are formed during the long cryogenic soak. These fine particles along with large particles form a denser, more coherent and much tougher matrix in the materia...
Description: Copyright belongs to proceeding publisher
URI: http://hdl.handle.net/2080/1737
Appears in Collections:Conference Papers

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